If your pool has a hydrostatic relef valve (which I believe is code throughout Florida) it could have opened and let ground water into the pool since our ground was VERY wet as the storm went through. It's still be raining too hard by me to even check my pool right now and we are supposed to have more rain through the week (NE FL coast for me on the barrier island between the Altantic and Intercoastal and in between Jax beach and St. Augustine beach).